ISO is a camera setting that represents sensitivity to light as a numerical value
. It is one of the three elements used to control exposure, along with aperture and shutter speed
. A higher ISO number indicates a higher sensitivity and a greater ability to capture light, but it can also result in more noise or graininess in the image
. The ISO setting is typically set and changed in the shooting settings menu, and it can be useful for increasing the shutter speed to freeze subjects in motion or to deepen the depth of field by narrowing the aperture
. In bright conditions, lower ISO values are better, while in low-light situations, higher ISO values are ideal
. The lowest native ISO on a camera is the base ISO, which gives the potential to produce the highest image quality, minimizing the visibility of noise as much as possible
